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--- general:wordpress [2020/11/17 18:16] – sunkan
+++ general:wordpress [2022/11/28 12:11] (current) – sunkan
@@ Line 6: / Line 6: @@
 One reason you may get PCLZIP_ERR_BAD_FORMAT is that php5-curl is missing \\
 This was happening when trying to update striking theme
+====== Clear redis cache ======
+Sometimes with WPML there is a need for clearing the redis cache (noticed when restructuring the product categories)
+This can be done with this script (when we have multiple prefixes in the DB, otherwise use Redis command "flushall".
+<code>
+-- Usage: redis-cli --eval <thisfile.lua> , 'the_search_string_*'
+-- Example: redis-cli --eval remove_matching_keys.lua , 'someprefix_*'
+-- Solution adapted from this: https://stackoverflow.com/a/65427976
+-- the "," is to pass an argument and not a key to the lua script
+local searchstring=ARGV[1]
+local keys_to_delete = redis.call('keys', searchstring)
+-- return keys_to_delete
+for _,k in ipairs(keys_to_delete) do
+  redis.call('del', k)
+end
+</code>